Multiply 0.3 by 10.
Apply the distributive property.
Multiply 0.1 by 30.
Move all terms containing y to the left side of the equation.
Subtract 0.1y from both sides of the equation.
Subtract 0.1y from 0.4y.
Move all terms not containing y to the right side of the equation.
Subtract 3 from both sides of the equation.
Subtract 3 from 3.
Divide each term by 0.3 and simplify.
Divide each term in 0.3y=0 by 0.3.
Cancel the common factor of 0.3.
Divide 0 by 0.3.
Solve for y 0.4y+0.3(10)=0.1(y+30)